Resilience of Beams. 451 DEFLECTION FOR UNIFORM BEAMS, WHEN Y = wl* 48121' Cantilever with concentrated load Cantilever with distributed load Girder with concentrated load ... Girder with distributed load............ Fixed beam with concentrated load ... Fixed beam with distributed load ......... Beam supported one end, fixed at other, central load Beam supported one end, fixed at other, distributed load i6Y 6Y A a and stiffness cc bh* b ffi ""*----""—*"*'* — /s and the practicable allowable deflection is, for cantilevers and for girders TV Per sPan- (See Appendix II., p. 855.) The Resilience of a Beam is equal to half the proof or elastic load multiplied by the corresponding deflection (see p, 367). For a girder with central load, 48 El „•. Resilience = 6/ w w'fi f^bhl i8E and cc ^ h I The Strength of Flat Surfaces in Boilers is best cal- culated by the Board of Trade empirical rule. Safe steam pressure/ r f j-6 where j— surface supported by one stay, in sq. ins. ./=» plate thickness. 100 when stays have nuts and large washers. 60 ditto, but exposed to flame. 36 stays riveted over and exposed to flame.